Heschen HSB6C-DC 25A DC Miniature Circuit Breaker User Manual

1. Introduction

The Heschen HSB6C-DC series miniature circuit breakers are specifically designed for photovoltaic (PV) systems. They are engineered to protect the DC distribution system from fault currents and safeguard photovoltaic modules, a critical component in solar power generation systems, against high DC reverse current and AC feedback current caused by inverter failures. This ensures the reliable and safe operation of the solar PV power generation system.

2. Safety Information

Installation and maintenance should only be performed by qualified personnel.
Always disconnect power before working on the circuit breaker or associated wiring.
Ensure proper grounding and adherence to all local and national electrical codes.
Do not operate the circuit breaker if it appears damaged.
Verify correct voltage and current ratings before installation.

3. Product Overview

3.1 Features

Current Rating: 25A
Rated Voltage: DC500V
Breaking Capacity: 4.5KA
Pole Number: 2P
Type C / Non-polarized design for flexible installation.

3.2 Components

The Heschen HSB6C-DC miniature circuit breaker features a robust housing, clearly marked ON/OFF positions, and screw terminals for secure wiring connections. It is designed for DIN rail mounting.

Figure 1: Front view of the Heschen HSB6C-DC 25A DC Miniature Circuit Breaker, showing the ON/OFF switch and terminal screws.

Close-up of the Heschen HSB6C-DC 25A DC Miniature Circuit Breaker label — Figure 2: Detailed view of the circuit breaker's label, indicating model HSB6C-DC C25, DC500V, IEC 60898-2 standard, and 4500A breaking capacity.

4. Specifications

Specification	Value
Current Rating	25 Amps
Rated Voltage	DC500V
Breaking Capacity	4.5KA
Pole Number	2
Mounting Type	35mm DIN Rail Mount
Model Number	HSB6C-DC 25A
Parcel Dimensions	8.5 x 8.3 x 4.1 cm
Weight	190 g

Graph showing tripping characteristics for Characteristic C circuit breakers — Figure 3: Tripping characteristics curve for Type C circuit breakers, illustrating the relationship between tripping time and current multiple (I/In).

5. Setup and Installation

5.1 Physical Installation

The Heschen HSB6C-DC circuit breaker is designed for easy installation on a standard 35mm DIN rail. Ensure the mounting surface is stable and secure.

Side view of the Heschen HSB6C-DC circuit breaker showing the DIN rail clip — Figure 4: Side view of the circuit breaker, highlighting the integrated clip for 35mm DIN rail mounting.

Detailed view of the Heschen HSB6C-DC circuit breaker terminals and DIN rail clip — Figure 5: Close-up of the terminals and the DIN rail mounting mechanism, showing how multiple units can be connected.

5.2 Wiring Connections

This circuit breaker is non-polarized, allowing for flexible connection of positive and negative DC lines to either terminal. Always use appropriate wire gauges for the current rating and ensure all connections are tight and secure. Use a screwdriver for terminal connections; power drills are not recommended to avoid overtightening and damage.

Wiring diagrams for the non-polarized Heschen HSB6C-DC circuit breaker — Figure 6: Wiring diagrams illustrating the non-polarized nature of the HSB6C-DC, showing various ways to connect the DC load.

Diagram showing connection of Heschen HSB6C-DC circuit breakers with a leakage protector — Figure 7: Example wiring diagram demonstrating how to integrate Heschen HSB6C-DC circuit breakers with a leakage protector in a system.

Illustration of correct tool usage for terminal screws: screwdriver recommended, power drill not recommended — Figure 8: Proper tool selection for terminal connections. A screwdriver is recommended for tightening terminal screws, while a power drill is not advised to prevent damage.

6. Operating Instructions

The circuit breaker features a simple toggle switch for operation. The 'ON' position indicates the circuit is closed and power is flowing. The 'OFF' position indicates the circuit is open and power is interrupted. In the event of an overload or short circuit, the breaker will automatically trip to the 'OFF' position to protect the system.

6.1 Switching On/Off

To turn the circuit ON, push the toggle switch upwards to the 'ON' position.
To turn the circuit OFF, pull the toggle switch downwards to the 'OFF' position.

6.2 Visual Operation Guide

The following videos demonstrate the physical operation of Heschen HSB6C-DC series miniature circuit breakers, including switching the device on and off.

Video 1: Demonstration of the Heschen HSB6C-DC Miniature Circuit Breaker (D100A model) being switched ON and OFF manually.

Video 2: Demonstration of the Heschen HSB6C-DC Miniature Circuit Breaker (80A model) being switched ON and OFF manually.

Video 3: Demonstration of the Heschen HSB6C-DC Miniature Circuit Breaker (20A model) being switched ON and OFF manually.

7. Maintenance

Regularly inspect the circuit breaker for any signs of physical damage, discoloration, or loose connections.
Ensure the area around the circuit breaker is clean and free from dust or debris to prevent overheating.
Do not attempt to repair a faulty circuit breaker; replace it with a new one of the same specifications.
Periodically check terminal screw tightness, especially after initial installation and during routine system checks.

8. Troubleshooting

8.1 Circuit Breaker Trips Frequently

Possible Cause: Overload in the circuit.
Solution: Reduce the load connected to the circuit. Ensure the total current draw does not exceed the circuit breaker's rated current (25A).
Possible Cause: Short circuit in the wiring or connected equipment.
Solution: Inspect all wiring and connected devices for short circuits. Repair or replace faulty components.
Possible Cause: Faulty circuit breaker.
Solution: If no overload or short circuit is found, the circuit breaker itself might be defective. Replace it with a new one.

8.2 Circuit Breaker Does Not Reset

Possible Cause: Persistent fault (overload or short circuit) still present.
Solution: Before attempting to reset, identify and clear the fault. The breaker will not reset if a fault condition persists.
Possible Cause: Internal damage to the circuit breaker.
Solution: If the fault has been cleared and the breaker still won't reset, it may be damaged. Replace the unit.

9. Warranty and Support

For warranty information or technical support regarding your Heschen HSB6C-DC 25A DC Miniature Circuit Breaker, please refer to the product packaging or contact Heschen customer service directly. Contact details can typically be found on the manufacturer's official website or through your point of purchase.